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H2CAST Etzel

Public information about this hydrogen project, including status, location, and technical detail.

Hover or focus the dot next to a value to see its confidence and source.

9 sourced values · 1 earlier records · 6 secondary context values

Sourced valueEarlier record, source not yet verifiedSecondary research context

Progress Statusconstruction and testingConfidence: Reported
Source: Salt caverns as flexible hydrogen storage facilities
CountryGermanyConfidence: Reported
Source: Gasunie and Storag Etzel start filling hydrogen caverns
Capacityup to 1TWh of hydrogenConfidence: Reported
Source: Gasunie and Storag Etzel start filling hydrogen caverns
LocationView on map →

Project Identity and Location

Public NameH2CAST EtzelConfidence: Reported
Source: Gasunie and Storag Etzel start filling hydrogen caverns

Project Purpose and Configuration

Componentstwo existing salt caverns; above-ground facilityConfidence: Reported
Source: Salt caverns as flexible hydrogen storage facilities
Configuration Detailconversion of two existing salt caverns and associated above-ground facilities for hydrogen storageConfidence: Reported
Source: Gasunie and Storag Etzel start filling hydrogen caverns
ProducthydrogenConfidence: Reported
Source: Gasunie and Storag Etzel start filling hydrogen caverns
Technologyunderground hydrogen storage in salt caverns with purification, compression, and multicyclic operating modesConfidence: Reported
Source: Salt caverns as flexible hydrogen storage facilities

Project Lifecycle and Change

Lifecycle Stagepilot projectConfidence: Reported
Source: Gasunie and Storag Etzel start filling hydrogen caverns

Earlier records

Technology detailUnknown PtXEarlier record
Original source not yet verified

Secondary research context

Tracker snapshots are supporting research, not verified project facts. They stay separate from the sourced-value count and do not replace confirmed values.

CountryGermanySecondary source
Confidence: Reported
Snapshot 2026-06-18
Source: Secondary source · International Energy Agency
Public NameEtzel, Salt cavernsSecondary source
Confidence: Reported
Snapshot 2026-06-18
Source: Secondary source · International Energy Agency
Event2007Secondary source
Confidence: Reported
Snapshot 2026-06-18
Source: Secondary source · International Energy Agency
Progress StatusDEMOSecondary source
Confidence: Reported
Snapshot 2026-06-18
Source: Secondary source · International Energy Agency
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ProductH2Secondary source
Confidence: Reported
Snapshot 2026-06-18
Source: Secondary source · International Energy Agency
TechnologyOther ElectrolysisSecondary source
Confidence: Reported
Snapshot 2026-06-18
Source: Secondary source · International Energy Agency

Sources

SourceTypePublisherAs of
Gasunie and Storag Etzel start filling hydrogen cavernsOriginal sourceGasunie
Salt caverns as flexible hydrogen storage facilitiesOriginal sourceBundesministerium für Wirtschaft und Energie / Energieforschung